Quick Answer. Depending on the species, catfish can live from eight to 20 years though the Mekong giant catfish lives more than 60 years. Almost 3,000 species of catfish have been catalogued throughout the world, but it is thought that as many as 4,500 exist. The Mekong giant catfish is the largest species of catfish.
Collagen, a protein, supports and your body's tissues and, literally, keeps your body from falling apart. Collagen is the primary component of the body's connective tissue. About 80% of the dermis -- the part of your skin that's under the epidermis (outer layer) -- is collagen.Collagen gives your skin strength.ollagen and elastin are fibers that make up the supporting structure of the skin. Collagen gives skin its firmness while elastin keeps skin tight. Both of these fibers are plentiful in young skin and start to break down with natural aging and as a result of sun exposure.
The dermis is the second, or middle, layer of a person's skin. It contains fibers of collagen and elastin, which are important proteins. The collagen and elastin in this layer of skin form a durable mesh-like layer.he dermis contains fibers of collagen and elastin, which deplete as a person ages. A diagram of younger skin and older skin showing the different layers. Most anti-aging creams are too dense to penetrate to the demis. The dermis is below the epidermis, or the top layer of skin.